“Pssst – what’s New START?”

In his first call as president with Russian leader Vladimir Putin, Donald Trump denounced a treaty that caps U.S. and Russian deployment of nuclear warheads as a bad deal for the United States, according to two U.S. officials and one former U.S. official with knowledge of the call.

When Putin raised the possibility of extending the 2010 treaty, known as New START, Trump paused to ask his aides in an aside what the treaty was, these sources said.

Trump then told Putin the treaty was one of several bad deals negotiated by the Obama administration, saying that New START favored Russia. Trump also talked about his own popularity, the sources said.

So that’s worrying. I know he’s made similar noises before, but now he can put them into action.

Two Democratic members of the Senate Foreign Relations Committee, senators Jeanne Shaheen and Edward J. Markey, criticized Trump for deriding what they called a key nuclear arms control accord.

“It’s impossible to overstate the negligence of the president of the United States not knowing basic facts about nuclear policy and arms control,” Shaheen said in a statement. “New START has unquestionably made our country safer, an opinion widely shared by national security experts on both sides of the aisle.”

Daryl Kimball, the executive director of the Arms Control Association, a Washington-based advocacy group, said: “Unfortunately, Mr. Trump appears to be clueless about the value of this key nuclear risk reduction treaty and the unique dangers of nuclear weapons.”

It didn’t help that he wasn’t briefed before he picked up the phone.

The phone call with Putin has added to concerns that Trump is not adequately prepared for discussions with foreign leaders.

Typically, before a telephone call with a foreign leader, a president receives a written in-depth briefing paper drafted by National Security Council staff after consultations with the relevant agencies, including the State Department, Pentagon and intelligence agencies, two former senior officials said.

Just before the call, the president also usually receives an oral “pre-briefing” from his national security adviser and top subject-matter aide, they said.

Trump did not receive a briefing from Russia experts with the NSC and intelligence agencies before the Putin call, two of the sources said. Reuters was unable to determine if Trump received a briefing from his national security adviser Michael Flynn.

I guess he doesn’t need briefings, because he understands things better than almost anyone. He says so himself.

If he hasn’t used Spacejunkie’s “Obame bad, Trump good’ heuristic, then someone is telling him that the treaty is bad. He’s probably all keen to put his incredible deal-making skills to work. It’ll be the best deal ever. But how do you improve on a deal when you haven’t a clue what the terms of the original deal were?